Home / 1,250.91-1,721.79-1,038.76

Finding the Fourth Proportional to 1,250.91, 1,721.79 and 1,038.76

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Solution

The fourth proportional to 1,250.91, 1,721.79 and 1,038.76 is: 1,429.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.91 : 1,721.79 = 1,038.76 : x
  2. Step 2: Convert to fraction form
    1,250.91/1,721.79 = 1,038.76/x
  3. Step 3: Cross multiply
    1,250.91x = 1,721.79 × 1,038.76
  4. Step 4: Simplify right side
    1,250.91x = 1,788,522.28
  5. Step 5: Solve for x
    x = 1,788,522.28/1,250.91
  6. Step 6: Final answer
    x = 1,429.78

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.